Design of bolted connections for Appex and Eave, according to EN1993-1-8.

Design of column base joint according to EN1993-1-8. Anchoring system for to resist uplift forces according to CEN/TS 1992-4

Design of concrete foundation, according to EN1997-1-1 and EN1992-1-1.

Design for seismic loading using both Lateral force method, and Modal superposition spectrum analysis according to EN1998-1-1.

You can select the method of computing the interaction coefficients for combined axial and lateral buckling according to Eurocode3 EN1993-1-1 § 6.3.3.
Method-1 is described in Annex A of Eurocode3 EN1993-1-1 and
Method-2 is described in Annex B of Eurocode3 EN1993-1-1 .